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Entry  Tue May 24 00:21:31 2011, Zach, Electronics, GYRO, revised PDH2 schematic PDH2.pdf
    Reply  Tue May 24 19:56:08 2011, Zach, Electronics, GYRO, revised PDH2 schematic PDH2.pdf
       Reply  Thu May 26 06:28:59 2011, Frank, Electronics, GYRO, revised PDH2 schematic 
          Reply  Thu May 26 09:17:44 2011, Zach, Electronics, GYRO, revised PDH2 schematic 
             Reply  Fri May 27 10:15:26 2011, Frank, Electronics, GYRO, revised PDH2 schematic 
                Reply  Fri May 27 10:20:47 2011, Zach, Electronics, GYRO, revised PDH2 schematic 
                   Reply  Mon May 30 15:22:22 2011, rana, Electronics, GYRO, revised PDH2 schematic 
                      Reply  Tue May 31 15:59:21 2011, Zach, Electronics, GYRO, revised PDH2 schematic PDH2.pdf
Message ID: 1430     Entry time: Tue May 31 15:59:21 2011     In reply to: 1429
Author: Zach 
Type: Electronics 
Category: GYRO 
Subject: revised PDH2 schematic 

I've put two Coilcraft 1:1 transformers (PWB-1010L) in the schematic, one between the LO input and the mixer and one between two SMP connectors (in from the RFPD and out to the mixer RF input). You can see the schematic if you click on the PCB below to see the full file.

PDH2.pdf

Quote:

I guess that we should transformer couple the LO and RF inputs to the box in any case. There's no downside to this. Its better to do it now, before stuffing the board rather than try to hang an external transformer off of it later. Make sure to get a 1:1 with a high enough power rating.

 

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